Electric railway-signal.



R. P. KISTLER. ELECTRIC RAILWAY SIGNAL. APPLICATION FILED JULY 25, 1911.

1,032,913. Patented July 16, 1912.

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. r A i DJ r; it) i A m WITNESSES I INVENTOR iflz f. M52255 & WWW/Whig" ATTORNEYS" R. P. KISTLER. ELECTRIC RAILWAY SIGNAL. APPLICATION FILED JULY 25, 1911. Lgg g 0 Patented July 16, 1912.

WITNESSES RALPH FEATHER KISTLER, 0F PO NGA, OKLAHOMA.

ELEc'rnIc RAILWAY-SIGNAL.

Specification of Letters Patent.

Patented July 16, 1912.

Application filed July 25', 1911. Serial No. 640,431.

To all whom it may concern:

Be it known that I, RALPH P. KISTLER, a citizen of the United States, and a resident of Ponca city, in the county of Key and Qtate of Oklahoma, have made certain new and useful Improvements in Electric Railway-Signals, of which the following is a specification.

My invention. relates to improvements in electric railway signals and it consists in the combinations, constructions and arrangements herein described and claimed.

An object of my invention is to provide a device by means of which two engines which are approaching each other may be warned by means of signals to-indicate such approach, when these engines are approaching head on, or when they are both going in the same direction.

A further objectof my invention is to provide means for indicating whether an engine is approaching from ahead or from the rear.

A further object of my invention is to provide a comparatively simple arrangen'lent for carrying out the first named objects.

Other objects and advantages will appear in the following specification and the novel features otthe invention will he particularly pointed out in the appended claims.

lily invention is illustrated in the accom panying drawings forming part of this application. in which similar reference characters indie-a to like parts in the several views and in which--- Figure l is a diagrammatic view showing the arrangement of the signaling circuitwhen two trains are proceeding in the same direction, and Fig. 2 is a similar View showing the arrangement of the signaling circuit when the two trains are approaching from opposite directions.

Referring now particularly to Fig. 1, I have shown therein a track composed of rails l and 2 which are insulated from the ground, the rails 1 being cut into blocks endingalternately with blocks of the rails 2 these blocks being separated by insulating sections C. A third rail. 3 which is c0ntinuous is also provided. Sources of current such batteries B are connected in series with the third rail 3. At X I have indicated in dotted lines an engine and at Y a second engine. Each of these engines is provided with an equipment like that illustrated in the figure. It consists of a trolley 'Wheel or brush 4 arranged to engage the third rail when the engine is moving in either direction. Connected with this brush or. trolley wheel is a conductor 5 which leads to a polarized relay It which is connected with another polarized relay Q, by means of the conductor The relay Q in turn is connected by means of the conductor 7 with the axle 8 of the wheels 9 which run on the tracks 1 and 2.

The relay R is provided with an armature 1", while the relay Q is providedovith a similar armature r The armature 1 is connected by means of a conductor 10 with one terminal 11 of a double-pole switch S! The armature g is connected to the terminal 12 by means of the conductor 13. The con doctor 14 connects the contact points 15 and 16 the former being adapted to be engaged by the armature r and the latter by the armature g. A local'battery B has one side connected to the conductor 14, while the other is connected with a red light L by means of the conductor 18, which is in series with a gong G, the gong being in "turn connected to the central terminal 17 of the switch 3. Connected with the conductor 18 is a green light L A hell 7) is in series with the lamp L, the bell being connected to the central terminal 19.

Each engine is equipped with an apparatus similar to that just described. Let us assume that the line runs east. and west, west being toward the left of the sheet as indicated by W, and east being toward the right of the sheet as indicated by E. The engines proceeding east will have their switches thrown down z'. 6., the points corresponding to 19-20 and 1721 being connected,- while the engines' n'oceeding west will have their switches thrown up, e., the points 1942 and 17-11 will be connected. Let is consider the first case in which both engines are proceeding in the same direction. In Fig. 1 I have shown the engines as proceedingeast. Therefore both of the switches will be down. It will be noted that the division of the track by the insulating joints 0 divides the track up into blocks which end alternately. If two trains are in the same block, then a circuitis established as follows: from the batteries B along the third rail 3 in the di reotion indicated. by the arrow, thence through trolley wheel 4:, conductor 5', relay.

s 9 9 7 7 7 7 6, 7 and back to battery.

The relays R and R are so polarized with'the current passing in the direction in'- At the same time that the engine Y is get-- ting its signal the pulling up of the armature q in engine Xagainst its contact 16 will close the following circuit: battery 13 14,

16,. 9,13, 12, 21,17, G, L, 18,'back to battery 13". The gong G will be sounded and "the red lamp'L willglow. It will be noted that the engine Y will have a green lightand the small bell as the signal, thus indicating that a train is approaching from behind, while the engine X will have the largev gong soundedand the red light L, thus indicating that a train or an engine is ahead.

' Consider now the case when two engines are approaching asshown in Fig. 2. When they enter the same block current will be established as follows: from the batteries B along the third "rail 3 and through 4, 5,R, ago, 7', 8, 9, 1, 9, s, 7, Q, 6,-R, 5, 4, back to battery B. Since the engine X is pro ceeding east its switch S is down, while the engine Y which is going. toward the west has its switch S up. The movement of the armature r of the relay R against its contact 15 will establish a circuit as follows: battery 13*, 1 1, 15, r, 10, 11, 17, gong G, lamp L", 18, backto battery 13*. This will cause the gong G to ring and the red lamp If to glow, thus indicating that, an engine is approaching-from ahead. At

the same time the movement of the arma.

ture q of the relay Q against its contact 16 ,will close the following'circuit: battery B, 14, 1G, I 13, 21, 17, G, L, 18, back to battery B. This will cause the ringing of the gong G and the lighting of the lamp If, thus indicating that another engine is approaching from the front in the same block. Similarly it might be shown that when the two engines are proceeding west, the engine Xwill get a green signal showing that a train is approaching from the rear, while the engine Y will get a red signal showing that it is approaching a train ahead.

It will thus be seen that I have provided Copies of this patent may be obtained for five cents each, by addressing the Commissioner of 1atents,

audible and signalsoit difierentkind's to indicate clearly tot-he engineer whether there is a ;tr ain' ahead of himor whether there IS a trainbehind. Of course, when one trainpasses out of a block thenthe maincircuit is broken and consequently the absence of signals will indicate a clear block. Whlle I have here indicated the signal bell and light asin series, it is understood that they may be placed in multiple instead, as the user may prefer.

I claim 1. In a block'signaling system, a pair of main track rails divided upinto insulated sections, a third rail, sources of current similarly connected with said third rail, one in each block, engines arranged to run on said track rails, each engine being provided with a contact memberarranged to engage said third rail, an engine equipment comprising "a pair of oppositely polarized relays connected in series on one side with said contact member and on the other-side with said track rails and each provided with an arma ture, a pair of local circuits controlled by the armatures of said' clays, means for shifting the control of each local circuit fromone relay to the other, indicating means in each local circuit, and a common batteryfor said local circuits.-

2. In a block signaling system, a pair of main track rails, a third rail, an engine equipment comprising a contact member arranged to engage said third rail, a pair of oppositely polarized relays connected in series on one side with said contact member and on the other side with said track rails and each provided with an armature, a pair of local circuits controlled by the armatures of said relays, means for shifting the control of each local circuit from one relay to the other, a visible and an audible signal in each local circuit, and a common battery for said local circuits.

3. In a block signaling system, an engine equipment comprising a pair of oppositely polarized relays, said relays being connected in series with each other, an armature for each relay, a pair of local circuits each adapted to be controlled by either armature, a switch for reversing the control of the pair of local circuits, a: lamp and a bell "in series in each of said local circuits, and a battery common to both local circuits for supplying current to said lamps and sald bells.

RALPH FEATHER KISTLER.

W'itnesses:

A. C. SMITH, J. P. \ViL'rIrrE.

Washington, D. C. 

